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Rating | 60 deg C, 30 Vac, Cable flame for Use No. 1B and 2B, Horizontal flame for Use No. 1A and 2A. |
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Conductor | 40 AWG minimum. |
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Insulated Conductor | Material not specified for Use No. 1A or 1B. Labeled or complies with manufacturer's Procedure for Use No. 2A or 2B. |
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Assembly | Two or more conductors, twisted pairs, or groups of twisted conductors. The conductors may be laid parallel or twisted together to form a flat, oval, or round cable construction. Lay not specified. Barrier layer and/or fillers optional. May use same or mixed AWG sizes. Manufacturer shall maintain a complete description of each assembly. |
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Covering | Optional. Extruded PVC, 5 mils minimum thickness at any point, over the assembly or groups of singles. |
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Shield | Optional. May be over one or more of the insulated conductors or applied over the assembly. |
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Jacket | Extruded PVC. If parallel construction is rippable, the measurements are made after ripping. |
| Diameter of cable under jacket* | Minimum average thickness | Minimum thickness at any point |
| 0.250 inch or less (1A & 2A only) | 15 mils | 13 mils |
| 0.250 inch or less (1B & 2B only) | 30 mils | 27 mils |
| 0.251-0.424 inch | 30 mils | 27 mils |
| 0.425-0.700 inch | 60 mils | 48 mils |
| 0.701-1.500 inch | 80 mils | 64 mils |
| 1.501-2.500 inch | 110 mils | 88 mils |
| 2.501 inch or larger | 140 mils | 112 mils |
| * = Major diameter if flat or oval construction. |
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Standard | Appliance Wiring Material UL 758. |
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Marking | General. |
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Use | Use No. 1A:, Internal wiring in Class 2 circuits of electronic equipment where each end is terminated in connectors.; Use No. 1B:, CABLES - using 30 mils or greater jacket thickness only: External interconnection or internal wiring in Class 2 circuits of electronic equipment where each end is terminated in connectors.; Use No. 2A:, Internal wiring in Class 2 circuits of electronic equipment where not routed along walls, floors, or other abuse areas.; Use No. 2B:, CABLES - using 30 mils or greater jacket thickness only: External interconnection or internal wiring in Class 2 circuits. |
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